Should a lab be so fortunateas to discover a molecule that cures a disease in a lab rat, the next step isto test its toxicity and efficacy in more lab animals.

要是一间实验室幸运到发现了能治愈实验室老鼠身上疾病的分子，下一个步骤是在更多的实验室动物上测试它的毒性和效用。

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The zoo is an ideal research center where scientists can conduct experiments on animals to discover the causes of some diseases and develop new cures.

动物园是个理想的研究中心，科学家们可以在动物身上做实验，找出一些疾病的成因并研制出新的疗法。

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Scientists of the future will certainly find effective ways to make life last longer and discover cures for almost all diseases.

未来的科学家一定会找到延年益寿的有效方法，肯定会发现治疗几乎所有疾病的方法。

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